Suzumu (スズム) is a producer most notable for making arrangement covers for both VOCALOID and non-VOCALOID works. Examples for VOCALOID covers would be Neru's "Tokyo Teddy Bear" and 150P's "Kodoku no Kakurenbo". As for non-VOCALOID works, he often collaborates with the utaite Soraru and Lon, and illustrators Saine and MACCO, in their circle, Asukasoromanya-z. Suzumu is also known for his collabs with kemu, for the Pandora Voxx series as "SMC." However, he is a lyricist too, having written lyrics of the Bookmark of Demise Project. Later on, he began making his own VOCALOID original songs as well. His first song, in which he wrote both the music and lyrics, is "Hitori no Kimi to Hitori no Boku ni". On October 10, 2015 he announced his retirement and stopped producing works in relation to VOCALOID.